/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2010 huliqing, huliqing.cn@gmail.com
 *
 * This file is part of QFaces.
 * QFaces is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * QFaces is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with QFaces.  If not, see <http://www.gnu.org/licenses/>.
 *
 * 这个文件是QFaces的一部分。
 * 您可以单独使用或分发这个文件，但请不要移除这个头部声明信息.
 * QFaces是一个自由软件，您可以自由分发、修改其中的源代码或者重新发布它，
 * 新的任何修改后的重新发布版必须同样在遵守LGPL3或更后续的版本协议下发布.
 * 关于LGPL协议的细则请参考COPYING、COPYING.LESSER文件，
 * 您可以在QFaces的相关目录中获得LGPL协议的副本，
 * 如果没有找到，请连接到 http://www.gnu.org/licenses/ 查看并获取副本。
 *
 * - Author: Huliqing
 * - Contact: huliqing.cn@gmail.com
 * - License: GNU Lesser General Public License (LGPL)
 * - Blog and source code availability: http://www.huliqing.name/
 */

Q.F.UIHelper = {
	init : function(clientId, componentClass, listenerExp, lazy, ID_BUTTON, ID_FRAME, ID_CONTENT, helpId) {
		var helper = new Q.F.Helper(clientId, componentClass, listenerExp, lazy, ID_BUTTON, ID_FRAME, ID_CONTENT, helpId);
		Q.F.put(clientId, helper);
	},
	display : function(clientId) {
		var helper = Q.F.find(clientId);
		helper.display();
	}
}
Q.F.Helper = function(clientId, componentClass, listenerExp, lazy, ID_BUTTON, ID_FRAME, ID_CONTENT, helpId) {
	this.clientId = clientId;	// 组件客户端ID
	this.ui = Q.get(clientId);
	this.componentClass = componentClass;
	this.listenerExp = listenerExp;
	this.lazy = (lazy == "true" ? true : false);
	this.button = Q.get(ID_BUTTON);
	this.frame = Q.get(ID_FRAME);
	this.content = Q.get(ID_CONTENT);
	this.loaded;	// 是否已经装载过message,
	this.helpId = helpId;
	
	this.init = function() {
		var _self = this;
		this.loaded = !this.lazy;
		this.button.onclick = function() {
			_self.display();
		}
		this.button.style.cursor = "pointer";
		Q.U.close(this.frame);
	}
	this.display = function() {
		Q.U.display(this.frame);
		if (Q.U.isVisible(this.frame)) {
			var pos = Q.U.getMousePosition();
			Q.U.setPosition(this.frame, pos.x - 10, pos.y + 10);
			if (!this.loaded) {
				// 用户可能没有绑定listener(只绑定了message属性)
				if (this.listenerExp != null && this.listenerExp != "") {
					this.content.innerHTML = "";
					this.content.appendChild(Q.F.getLoading());
					this.loadByAjax(this);				
				}
			}
		}
	}
	this.loadByAjax = function(_self) {
		var ajax = Q.F.Ajax.build(this.clientId);
		ajax.put("componentClass", this.componentClass);
		ajax.put("listenerExp", this.listenerExp);
		ajax.put("helpId", this.helpId);
		var processWhenOK = function() {
			var result = ajax.request.responseText;
			_self.content.innerHTML = result;
			_self.loaded = true;
		}
		ajax.setProcess(processWhenOK);
		ajax.get();
	}
	// init 
	this.init();
}